Helper for customization and wrapping actual errors, hiding from users
// wrap inner error
err := errors.New("new inner error")
err = errorx.New("user_friendly_text", errorx.WithInner(err))
...
// add caller line
err = errorx.New("user_friendly_text", errorx.WithInner(err), errorx.WithCaller())
...
// add custom fields
err = errorx.New("user_friendly_text",
errorx.WithInner(err),
errorx.WithString("key", "value"),
errorx.WithInt("key2", 123),
)
...
// typed error
const CustomType errorx.Type = 1
err = errorx.New("user_friendly_text", errorx.WithInner(err), errorx.WithType(CustomType))
...
// extract custom fields to json
if errX := errorx.AsError(err); errX != nil {
str, _ := errX.JSONString()
log.Printf("error: %s fields: %s", err, str)
}
...
// extract custom fields
if errX := errorx.AsError(err); errX != nil {
for _, field := range errX.Fields() {
var key, value string
key = field.Key
value = field.Value
}
}
...
// check custom type
switch errX.Type() {
case CustomType:
// handle custom type err
default:
// do something else
}See full integration example here.